import pygame
pygame.init()
size = width, height = 480, 480
screen = pygame.display.set_mode(size)

black, white = (0, 0, 0),(255, 255, 255)

pygame.draw.rect(screen, white, (0, 0, width, height))

pygame.draw.line(screen, black, (160, 0), (160, 480), 5)
pygame.draw.line(screen, black, (320, 0), (320, 480), 5)
pygame.draw.line(screen, black, (0, 160), (480, 160), 5)
pygame.draw.line(screen, black, (0, 320), (480, 320), 5)

pygame.display.flip()

